package com.atguigu.day18.lambda04.l1;

@FunctionalInterface
interface G{
    int num(int a, int b);
}

@FunctionalInterface
interface F{
    String concat(String a,double b,int c);
}

@FunctionalInterface
interface E{
   int sum(int a,int b);
}

@FunctionalInterface
public interface Fly {
    void flying();
}

@FunctionalInterface
interface D{
    void show(int num);
}

class Bird implements Fly {

    @Override
    public void flying() {
        System.out.println("小鸟飞.....");
    }
}